How do you get "this" look?
Perhaps what you like in these pictures is that the materials are somewhere between plastic, modeling clay and skin, which I guess is a mix between glossy and translucency. You could try with this: Mix Diffuse and Glossy nodes, with a Fresnel as factor, and mix this with a Subsurface Scattering which will give the translucency and lightness. For the second picture maybe he used an Image Texture for the skin (blushed cheeks), that he plugged into the Diffuse.